Time Machine encryption Question

I created a fresh backup drive as Mac OS X Extended Journaled. When I plugged in this drive OS X asked if I wanted to use this disk as my backup disk and I also elected to encrypt it. That started an "Encrypting" process that was only 50% done after 6 hours.

I had to stop the process because of a storm. I erased and reformatted the drive again as Mac OS X Extended Journaled and the system again asked if I wanted to use this drive as my backup drive. The difference is after I selected "Encrypted" it did NOT go through that process and immediately started backing up the drive.

The icon for the drive did not change into a time machine icon, but in System Preferences it calls the drive "Encrypted." Is it really encrypted or was there some kind of error?